President and CEO Craig Aaron, "The revolving door never seems to stop spinning at the Federal Communications Commission."

Just half a year after resigning his 4-year post as chairman of the FCC, Julius Genachowski has joined the famously shadowy private equity firm Carlyle Group, known by some as the "ex-presidents' club."

Genachowski will "focus on investments in global technology, media and telecom, including Internet and mobile," reads a Carlyle Group statement released Monday announcing Genachowski's position.